static int _POSIX_Threads_Join( pthread_t thread, void **value_ptr ) { Thread_Control *the_thread; Thread_queue_Context queue_context; Per_CPU_Control *cpu_self; Thread_Control *executing; void *value; _Thread_queue_Context_initialize( &queue_context ); _Thread_queue_Context_set_expected_level( &queue_context, 1 ); the_thread = _Thread_Get( thread, &queue_context.Lock_context ); if ( the_thread == NULL ) { return ESRCH; } cpu_self = _Per_CPU_Get(); executing = _Per_CPU_Get_executing( cpu_self ); if ( executing == the_thread ) { _ISR_lock_ISR_enable( &queue_context.Lock_context ); return EDEADLK; } _Thread_State_acquire_critical( the_thread, &queue_context.Lock_context ); if ( !_Thread_Is_joinable( the_thread ) ) { _Thread_State_release( the_thread, &queue_context.Lock_context ); return EINVAL; } if ( _States_Is_waiting_for_join_at_exit( the_thread->current_state ) ) { value = the_thread->Life.exit_value; _Thread_Clear_state_locked( the_thread, STATES_WAITING_FOR_JOIN_AT_EXIT ); _Thread_Dispatch_disable_with_CPU( cpu_self, &queue_context.Lock_context ); _Thread_State_release( the_thread, &queue_context.Lock_context ); _Thread_Dispatch_enable( cpu_self ); } else { _Thread_Join( the_thread, STATES_INTERRUPTIBLE_BY_SIGNAL | STATES_WAITING_FOR_JOIN, executing, &queue_context ); if ( _POSIX_Get_error_after_wait( executing ) != 0 ) { _Assert( _POSIX_Get_error_after_wait( executing ) == EINTR ); return EINTR; } value = executing->Wait.return_argument; } if ( value_ptr != NULL ) { *value_ptr = value; } return 0; }
void _Thread_Close( Thread_Control *the_thread, Thread_Control *executing ) { Thread_queue_Context queue_context; _Thread_queue_Context_initialize( &queue_context ); _Thread_queue_Context_set_expected_level( &queue_context, 2 ); _Thread_queue_Context_set_no_timeout( &queue_context ); _Thread_State_acquire( the_thread, &queue_context.Lock_context.Lock_context ); _Thread_Join( the_thread, STATES_WAITING_FOR_JOIN, executing, &queue_context ); _Thread_Cancel( the_thread, executing, NULL ); }
void _Thread_Close( Thread_Control *the_thread, Thread_Control *executing, Thread_Close_context *context ) { context->cancel = the_thread; _Thread_queue_Context_set_enqueue_callout( &context->Base, _Thread_Close_enqueue_callout ); _Thread_queue_Context_set_no_timeout( &context->Base ); _Thread_State_acquire_critical( the_thread, &context->Base.Lock_context.Lock_context ); _Thread_Join( the_thread, STATES_WAITING_FOR_JOIN, executing, &context->Base ); }